#include
//#include
static int w[44]; //密钥对应的扩展数组
static unsigned char round_key[176];
// S盒
static const unsigned char AES_Sbox[256] =
{
0x63, 0x7c, 0x77, 0x7b,
0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab,
0x76,
0xca, 0x82, 0xc9, 0x7d,
0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72,
0xc0,
0xb7, 0xfd, 0x93, 0x26,
0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31,
0x15,
0x04, 0xc7, 0x23, 0xc3,
0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2,
0x75,
0x09, 0x83, 0x2c, 0x1a,
0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f,
0x84,
0x53, 0xd1, 0x00, 0xed,
0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58,
0xcf,
0xd0, 0xef, 0xaa, 0xfb,
0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f,
0xa8,
0x51, 0xa3, 0x40, 0x8f,
0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3,
0xd2,
0xcd, 0x0c, 0x13, 0xec,
0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
0x73,
0x60, 0x81, 0x4f, 0xdc,
0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b,
0xdb,
0xe0, 0x32, 0x3a, 0x0a,
0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4,
0x79,
0xe7, 0xc8, 0x37, 0x6d,
0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae,
0x08,
0xba, 0x78, 0x25, 0x2e,
0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b,
0x8a,
0x70, 0x3e, 0xb5, 0x66,
0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d,
0x9e,
0xe1, 0xf8, 0x98, 0x11,
0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28,
0xdf,
0x8c, 0xa1, 0x89, 0x0d,
0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb,
0x16 };
static const unsigned char Sbox[16][16] =
{
0x63, 0x7c, 0x77, 0x7b,
0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab,
0x76,
0xca, 0x82, 0xc9, 0x7d,
0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72,
0xc0,
0xb7, 0xfd, 0x93, 0x26,
0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31,
0x15,
0x04, 0xc7, 0x23, 0xc3,
0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2,
0x75,
0x09, 0x83, 0x2c, 0x1a,
0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f,
0x84,
0x53, 0xd1, 0x00, 0xed,
0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58,
0xcf,
0xd0, 0xef, 0xaa, 0xfb,
0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f,
0xa8,
0x51, 0xa3, 0x40, 0x8f,
0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3,
0xd2,
0xcd, 0x0c, 0x13, 0xec,
0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
0x73,
0x60, 0x81, 0x4f, 0xdc,
0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b,
0xdb,
0xe0, 0x32, 0x3a, 0x0a,
0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4,
0x79,
0xe7, 0xc8, 0x37, 0x6d,
0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae,
0x08,
0xba, 0x78, 0x25, 0x2e,
0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b,
0x8a,
0x70, 0x3e, 0xb5, 0x66,
0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d,
0x9e,
0xe1, 0xf8, 0x98, 0x11,
0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28,
0xdf,
0x8c, 0xa1, 0x89, 0x0d,
0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb,
0x16 };
// 逆S盒
static const unsigned char Sbox_inv[16][16] =
{
0x52, 0x09, 0x6a, 0xd5,
0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7,
0xfb,
0x7c, 0xe3, 0x39, 0x82,
0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9,
0xcb,
0x54, 0x7b, 0x94, 0x32,
0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3,
0x4e,
0x08, 0x2e, 0xa1, 0x66,
0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1,
0x25,
0x72, 0xf8, 0xf6, 0x64,
0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6,
0x92,
0x6c, 0x70, 0x48, 0x50,
0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d,
0x84,
0x90, 0xd8, 0xab, 0x00,
0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45,
0x06,
0xd0, 0x2c, 0x1e, 0x8f,
0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a,
0x6b,
0x3a, 0x91, 0x11, 0x41,
0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6,
0x73,
0x96, 0xac, 0x74, 0x22,
0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf,
0x6e,
0x47, 0xf1, 0x1a, 0x71,
0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe,
0x1b,
0xfc, 0x56, 0x3e, 0x4b,
0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a,
0xf4,
0x1f, 0xdd, 0xa8, 0x33,
0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec,
0x5f,
0x60, 0x51, 0x7f, 0xa9,
0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c,
0xef,
0xa0, 0xe0, 0x3b, 0x4d,
0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99,
0x61,
0x17, 0x2b, 0x04, 0x7e,
0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c,
0x7d };
// 常量轮值表
static const unsigned char AES_Rcon[10] = { 0x01, 0x02, 0x04,
0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };
static const int Rcon[10] = { 0x01000000, 0x02000000,
0x04000000, 0x08000000, 0x10000000,
0x20000000, 0x40000000, 0x80000000, 0x1b000000, 0x36000000 };
void printBuf(unsigned char *buf,int len)
{
int i;
for(i = 0;i <
len;i++)
{
if((i2 == 0) && (i != 0))
printf("\n");;
printf("x ",buf[i]);
}
printf("\n");
}
void printBuf_Oct(unsigned char *buf,int len)
{
int i;
for(i = 0;i <
len;i++)
{
if((i2 == 0) && (i != 0))
printf("\n");;
printf("%d ",buf[i]);
}
printf("\n");
}
// 查找S盒，获得元素
static int getNumFromSBox(int index)
{
int row = ( index &
0x000000f0 ) >> 4; //低8位左4位
int col
= index &
0x0000000f;
//低8位右4位
return
Sbox[row][col];
}
//Int型分解为数组
static void splitIntToArray(int num, int array[4])
{
array[0] = (num >>
24) & 0x000000ff;
array[1] = (num >> 16) & 0x000000ff;
array[2] = (num >> 8 ) & 0x000000ff;
array[3] = (num >> 0 ) & 0x000000ff;
}
//数组合并成Int型
static int mergeArrayToInt(int array[4])
{
return (array[0] << 24) | (array[1] << 16)
|(array[2] << 8) |(array[3] << 0);
}
// 将数组中的元素循环左移step字节
static void leftLoop4int(int array[4], int step)
{
int temp[4];
int index;
for(int i = 0; i < 4;
i++)
temp[i] = array[i];
index = step % 4;
for(int i = 0; i < 4;
i++)
{
array[i] = temp[index];
index++;
index = index % 4;
}
}
// 密钥扩展中的T函数
static int T(int num, int round)
{
int numArray[4];
int result;
splitIntToArray(num,
numArray);
leftLoop4int(numArray,
1);
//字循环 ：Loopshiftleft 1
Byte
for(int i = 0; i < 4;
i++)
numArray[i] = getNumFromSBox(numArray[i]);
//字节代换
result =
mergeArrayToInt(numArray);
return result ^
Rcon[round];
//轮常量异或
}
// 把连续的4个字符合并成一个4字节的整型
static int getWordFromStr(unsigned char *str)
{
int one, two, three,
four;
one = (int)str[0] <<
24;
two = (int)str[1] <<
16;
three = (int)str[2] << 8;
four = (int)str[3]
<< 0;
return one | two | three
| four;
}
// 密钥扩展，结果存入w[44]
static void extendKey_1(unsigned char *key)
{
int i,j;
for(i = 0; i < 4;
i++)
w[i] = getWordFromStr(key + i *
4);
for(i = 4, j = 0; i <
44; i++)
{
if( i % 4 == 0)
{
w[i] = w[i
- 4] ^ T(w[i - 1], j);
j++; //下一轮
}
else
{
w[i] = w[i
- 4] ^ w[i - 1];
}
}
}
//---------------------------------------------------------------------------------------
// 密钥扩展，结果存入w[44]
static void extendKey_2(unsigned char *key)
{
unsigned char
t,a,b,c,d;
int i,j;
//
printf("
real_key : ");
// printBuf(key, 16);
for(i = 0; i < 16;
i++)
round_key[i] = key[i];
for(i = 16, j = 0; i
< 176; i++)
{
if( i % 16 == 0)
{
a =
round_key[i-4];
b =
round_key[i-3];
c = round_key[i-2];
d = round_key[i-1];
t = a;
a = b;
//字循环 ：Loopshiftleft 1
Byte
b = c;
c = d;
d = t;
a = AES_Sbox[a];
//字节代换
b = AES_Sbox[b];
c = AES_Sbox[c];
d = AES_Sbox[d];
a = a ^ AES_Rcon[j]; //轮常量异或
round_key[i+0] = round_key[i-16] ^ a; //异或
round_key[i+1] = round_key[i-15] ^ b;
round_key[i+2] = round_key[i-14] ^ c;
round_key[i+3] = round_key[i-13] ^ d;
i +=3; // +3，而不是+4
j++;
//下一轮
}
else
{
round_key[i] =
round_key[i-16] ^ round_key[i-4];
}
}
}
// 逆密钥扩展，由w[40]-w[43]得到Key
static void extendKey_inv_2(unsigned char *last_key)
{
unsigned char
t,a,b,c,d;
int i,j;
for(i = 159, j = 9; i
>= 0; i--)
{
if( (i-4) % 16 == 0)
{
a =
round_key[i+8];
b =
round_key[i+9];
c = round_key[i+10];
d = round_key[i+11];
t = a;
a = b;
//字循环 ：Loopshiftleft 1
Byte
b = c;
c = d;
d = t;
a = AES_Sbox[a];
//字节代换
b = AES_Sbox[b];
c = AES_Sbox[c];
d = AES_Sbox[d];
a = a ^ AES_Rcon[j]; //轮常量异或
round_key[i-4] = round_key[i+12] ^ a; //异或
round_key[i-3] = round_key[i+13] ^ b;
round_key[i-2] = round_key[i+14] ^ c;
round_key[i-1] = round_key[i+15] ^ d;
i -=4; // -4，而不是-3
j--;
//下一轮
}
else
{
round_key[i] = round_key[i+16] ^ round_key[i+12];
}
}
}
//---------------------------------------------------------------
// 逆密钥扩展，由w[40]-w[43]得到Key
static void extendKey_inv_1(unsigned char *last_key)
{
int i,j;
for(i = 0; i < 4;
i++)
w[i] = getWordFromStr(last_key + i *
4);
for(i = 39, j = 9; i
>= 0; i--)
{
if( i % 4 == 0)
{
w[i] = w[i
+ 4] ^ T(w[i + 3], j);
j--; //下一轮
}
else
{
w[i] = w[i
+ 4] ^ w[i + 3];
}
}
}
static void IntToChar(int *in, unsigned char *out, int
inlen)
{
int i;
for(i=0; i
{
out[4*i+0] = (*in
>> 24) & 0xff;
out[4*i+1] = (*in
>> 16) & 0xff;
out[4*i+2] = (*in
>> 8 ) & 0xff;
out[4*i+3] = (*in
>> 0 ) & 0xff;
in++;
}
}
int main(void)
{
unsigned char key[16] = {
0xb9,0x64,0x46,0x3b,0x0d,0xb0,0x5c,0x46,0xf2,0x50,0x42,0xf5,0xfd,0x72,0x8a,0x82
};
unsigned char last_key[16];
printf("The AES-128
Encrypt Key: ");
printBuf(key, 16);
printf("The AES-128 Encrypt Key: ");
printBuf_Oct(key, 16);
extendKey_1(key);
//密钥扩展
方式1
IntToChar(&w[40],
last_key, 4);
printf("The AES-128 Last
Key1: ");
printBuf(last_key, 16);
printf("The AES-128 Last
Key1: ");
printBuf_Oct(last_key, 16);
extendKey_2(key);
//密钥扩展 方式2
printf("The
AES-128 Last Key2: ");
printBuf(&round_key[160], 16);
extendKey_inv_1(last_key); //密钥扩展_逆运算
IntToChar(&w[0],
key, 4);
printf("The AES-128 Attack Key1: ");
printBuf(key, 16);
printf("The AES-128 Attack Key1: ");
printBuf_Oct(key, 16);
extendKey_inv_2(&round_key[160]); //密钥扩展_逆运算
printf("The AES-128 Attack Key2: ");
printBuf(&round_key[0], 16);
printf("The AES-128 Attack Key2: ");
printBuf_Oct(&round_key[0], 16);
return 0;
}
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